Description : Kinetics of an allosteric enzyme are explained by (A) Michaelis-Menten equation (B) Lineweaver-Burk plot (C) Hill plot (D) All of these
Last Answer : Answer : C
Description : Which one of the following statements is not characteristic of allosteric enzymes? (A) They frequently catalyze a committed step early in a metabolic pathway (B) They are often composed of subunits (C) They follow Michaelis-Menten kinetics (D) They frequently show cooperativity for substrate binding
Description : A sigmoidal plot of substrate concentration ([S]) verses reaction velocity (V) may indicate (A) Michaelis-Menten kinetics (B) Co-operative binding (C) Competitive inhibition (D) Non-competitive inhibition
Last Answer : Answer : B
Description : Michaelis – Menten equation is used to explain the effect of substrate concentration on (A) Carbohydrate (B) Enzyme (C) Lipid (D) Protein
Description : What is Michaelis Menten constant? -Biology
Last Answer : answer:
Description : From the L ineweaver-Burk p lot of Michaelis-Menten equation, Km and Vmax can be determined when V is the reaction velocity at substrate concentration S, the X-axis experimental data are expressed as (A) 1/V (B) V (C) 1/S (D) S
Description : What is Michaelis-Menten Theory ?
Last Answer : It is otherwise called enzyme-substrate complex theory. The enzyme combines with the substrate, to form an enzyme-substrate complex, which immediately breaks down to the enzyme and the product.
Description : The modern atomic theory was conceived by : w) Victor Grignard x) Daniel Rutherford y) Svante Arrhenius z) John Dalton
Last Answer : ANSWER: Z -- JOHN DALTON
Description : My theory of electrolytic dissociation earned me t 1903 Nobel Prize in chemistry. My name is: w) Niels Bohr x) Svante Arrhenius y) Michael Faraday z) John Cavendish
Last Answer : ANSWER: X -- SVANTE ARRHENIUS
Description : Who developed the model of atomic structure? (1) Bohr and Rutherford (2) Volta (3) Alfred Nobel (4) Faraday
Last Answer : (1) Bohr and Rutherford Explanation: In 1911 Ernest Rutherford used experimental evidence to show that an atom must contain a central nucleus. Niels Bohr further developed Rutherford's nuclear atom ... support the idea that electrons occupy particular orbits or shells around the nucleus of an atom.
Description : Who developed the model of atomic structure ? (1) Bohr and Rutherford (2) Volta (3) Alfred Nobel (4) Faraday
Last Answer : Bohr and Rutherford
Description : Who created periodic table? A. Faraday B. Lavoisier C. Arrhenius D. Mendeleev (Answer)
Last Answer : D. Mendeleev (Answer)
Description : 20. Which one of the following statements is incorrect about enzyme catalysis? (1) Enzymes are least reactive at optimum temperature (2) Enzymes are mostly proteinous in nature (3) Enzyme action is specific (4) Enzymes are denaturated by ultraviolet rays and at high temperature
Last Answer : Enzymes are least reactive at optimum temperature
Description : Kinetics of a catalytic reaction can be best studied on a/an __________ reactor. (A) Mixed (B) Integral (plug flow) (C) Differential (flow) (D) Either (A), (B) and (C)
Last Answer : (D) Either (A), (B) and (C)
Description : Kinetics of a solid catalysed reaction can best be studied in a __________ reactor. (A) Batch (B) Plug-flow (C) Mixed (D) None of these
Last Answer : (C) Mixed
Description : The Michaehis-Menten hypothesis: (A) Postulates the formation of an enzyme substrate complex (B) Enables us to calculate the isoelectric point of an enzyme (C) States that the ... independent of substrate concentration (D) States that the reaction rate is proportional to substrate concentration
Last Answer : Answer : A
Description : Define Michaelis constant of an enzyme. -Biology
Description : Substrate concentration at which an enzyme attains half its maximum velocity is (A) Threshold value (B) Michaelis-Menton constant (C) Concentration level (D) None of these
Description : The Michaelis constant, Km is (A) Numerically equal to ½ Vmax (B) Dependent on the enzyme concentration (C) Independent of pH (D) Numerically equal to the substrate concentration that gives half maximal velocity
Last Answer : Answer : D
Description : Different isoenzymes of an enzyme have the same (A) Amino acid sequence (B) Michaelis constant (C) Catalytic activity (D) All of these
Description : Which one of the following statements is incorrect about enzyme catalysis ?
Last Answer : Which one of the following statements is incorrect about enzyme catalysis ? A. Enzymes are ... at optimum temperature D. Enzymes action is specific
Description : Substance which increase the activity of certain enzymes called (a) Pro-enzyme (b) Iso-enzymes (d) Co-enzymes (d) Catalysis
Last Answer : c
Description : Which of the following statements about an enzyme exhibiting allosteric kinetics with cooperative interaction is false? (A) A plot of V-Vk [s] has a sigmaidal shape (B) An inhibitor may increase the ... Km and Vmax (D) Removal of allosteric inhibitor may result in hyperbolic V-S [s] plot
Description : In enzyme kinetics Km implies (A) The substrate concentration that gives one half Vmax (B) The dissocation constant for the enzyme substrate comples (C) Concentration of enzyme (D) Half of the substrate concentration required to achieve Vmax
Description : In enzyme kinetics Vmax reflects (A) The amount of an active enzyme (B) Substrate concentration (C) Half the substrate concentration (D) Enzyme substrate complex
Description : What are the salient features of enzyme kinetics?
Last Answer : Enzymes lower activation energy. They increase the chemical reaction, but do not alter equilibrium of the reaction.
Description : (4) None of these Explanation: Catalysis is the change in rate of a chemical reaction due to the participation of a substance called a catalyst. Unlike other reagents that ... may participate in multiple chemical transformations. Catalysts that speed the reaction are called positive catalysts.
Last Answer : Table salt gets moist during rainy season because – (1) sodium chloride is hygroscopic (2) sodium chloride is deliquescent (3) sodium chloride contains some quantity of sodium iodide (4) sodium chloride contains hygroscopic impurities like magnesium chloride
Description : What do you mean by activity and selectivity of catalysis?
Last Answer : Ans. Activity of catalyst means to increase the extent of chemisorption. Selectivity of Catalyst means to direct a reaction to form selective product.
Description : What is meant by induced catalysis ? Give an example.
Last Answer : It is a phenomenon in which a chemical reaction increases the rate of another reaction which otherwise may not occur in similar conditions. Eg. Sodium arsenite (Na3AsO3 ) is not oxidised in air but if ... a solution containing Na3AsO3 and Na2 SO3 , then both AsO3 3- and SO3 2- ions are oxidised.
Description : Shape-selective catalysis
Last Answer : Shape-selective catalysis : A catalytic reaction that depends upon the pore structure of catalyst as well as the size of reactant & product molecules is called Shape-selective catalysis.
Description : Mechanism of heterogeneous catalysis
Last Answer : Mechanism of heterogeneous catalysis :- The steps are as follows : (i) Diffusion of reactants on the surface of catalyst. (ii) Adsorption of reactants on the surface of catalyst. (iii) ... (ii) Desorption of product from solid surface. (iii) Diffusion of products away from solid surface.
Description : Which of the following is incorrect about heterogeneous catalysis? a. The most effective catalysts are those which have small surface area b. Seperation of catlyst is easy c. Increase in the rate of reaction is due to decrease in the activation energy d. It is based upon the phenomenon of adsorption
Last Answer : a. The most effective catalysts are those which have small surface area
Description : A family of organic compounds whose molecules will add water under an acid catalysis and change into alcohols are the: w) alkenes x) alkanes y) aromatic hydrocarbons z) cycloalkanes
Last Answer : ANSWER: W -- ALKENES
Description : The action of concentrated sulfuric acid on sugar best described as: w) catalysis x) oxidation y) reduction z) dehydration
Last Answer : ANSWER: Z -- DEHYDRATION
Description : What exactly WAS it about Micheal Jackson that caused him to get so insanely famous?
Last Answer : He was probably a combination of a few incredible qualities and talents. An phenomenal singer with an amazing range and tone. A fantastic dancer and showman. Writer, composer of great tunes, some of which are ... once in a generation act. Add to this the X factor, and timing or luck. Genius. Sad.
Description : Why do you think Micheal Jackson had all that cosmetic surgery done?
Last Answer : Never bothered to google if he made a statement about this or a person close to him did so. Seemed society and the media didn't make a big fuss about it or him. Maybe they did ... was more of being simply unsatisfied with his beautiful black features rather than self-loathing for simply being black.
Description : Does Micheal Jackson have any biological children?
Last Answer : None that have been acknowledged. If a possible biological child should surface, it would be as the old saying goes…. Momma’s baby, Poppa’s maybe. Yet another scandal~
Description : Is there a "Micheal Phelps" in Track and Feild?
Last Answer : I don't know if there is someone going for such a high number of medals, but there is Tyson Gay. He ran the fastest 100m dash recorded by a human. I believe he's only in that event, but his ... Powell) are some of the fastest guys to ever run the 100m dash. It should be a pretty exciting event.
Description : Does anyone know the how many people watched Micheal Phelps last night on TV?
Last Answer : answer:The world. Why do people act shocked that they’re not the only ones who watched the Olympics? I remember McDonalds used to buy everybody a hambuger when America won a gold medal.
Description : Who was Micheal Jordan's influence?
Last Answer : Need answer
Description : What is Micheal?
Last Answer : Michael is one of the seven archangels in Hebrew tradition. Michael is also a first name.
Description : What was micheal jackson #1 song?
Last Answer : Don't Stop 'Til You Get Enough (1979) Don't Stop 'Til You Get Enough is Jackson's first No. 1 hit that's not about a pet rat, and famously, the first song he claimed he wrote as a whole.
Description : A nucleophile acts as a __________ when it reacts with an electrophile. (a) Bronsted-Lowry acid (b) Arrhenius base (c) Lewis acid (d) Lewis base
Last Answer : Lewis base
Description : An electrophile acts as a __________ when it reacts with a nucleophile. (a) Bronsted-Lowry base (b) Arrhenius base (c) Lewis acid (d) Lewis base
Last Answer : Lewis acid
Description : How degree of ionization effects the strength of an acid or base according to Arrhenius concept?
Last Answer : Ans: An acid or base which will ionize completely, having high degree of ionization, will give more H+ or –OH ions. And will be a strong acid or base.
Description : An Arrhenius acid is a substance that: w) donates protons x) accepts protons y) donates hydrogen ions to water z) donates hydroxide ions to water
Last Answer : ANSWER: Y -- DONATES HYDROGEN IONS TO WATER
Description : The theory of interionic attraction attributed to Debye and Hückel: w) was disproved by Arrhenius x) accounts quantitatively for the attraction between ions in dilute aqueous solutions y) does not account for kindered "ion-activity" z) accounts for intra-molecular polar bonds
Last Answer : ANSWER: X -- ACCOUNTS QUANTITATIVELY FOR THE ATTRACTION BETWEEN IONS IN DILUTE AQUEOUS SOLUTIONS
Description : Name the person who developed a table of elements which revealed regularities in elemental properties in 1869? w) Theodore Richards x) Antoine Lavoisier y) Dmitri Mendeleev z) Svante Arrhenius
Last Answer : ANSWER: Y -- DMITRI MENDELEEV
Description : Does Sebastian Michaelis have a brother?
Last Answer : no
Description : The phenomenon of inhibition of glycolysis by O2 is termed as (A) Red drop (B) Pasteur effect (C) Michaelis effect (D) Fischer’s effect